Device for removing cross-heads



(No Model.)

0. A. MAGKAY.

DEVICE EOE REMOVING oEoss HEADS. No. 311,769. Patented Feb. 3, 1885,.

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CARL A. MACKAY, OF BOSTON, MASSACHUSETTS.

DEVICE FOR REMOVING CROSS-HEADS.

SPECIFICATION forming part of Letters Patent No. 311,769, dated February 3, 1885.

Application filed October 8, 1894.

To aZZ whom it may concern:

Be it known that I, CARL A. MAOKAY, of Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Devices for Be moving CrossHeads, of which the following is a description sufficiently full, clear, and

exact to enable any person skilled in the art or science to which said invention appertains to make and use the same,referencc being had to the accompanying drawingsforming apart of this specification, in which Figure 1 is a vertical longitudinal section of the piston-rod and cross-head and a side elevation of the wedge and keys, the wedge being represented as but partially inserted and the crosshead in position for use on the rod; Fig. 2, a like view representing the wedge fully inserted and the cross-head started from its seat or loosened on the rod, and Fig. 3 an isometrical perspective view of the wedge and keys detached.

Like letters of referenceindicate corresponding parts in the diiierent figures of the drawings.

My invention relates to means for removing the cross-heads of piston-rods, &c.; and it consists in anovel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a more effective device of this character is produced than ,is now in ordinary use. 7

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation, its extreme simplicity rendering an elaborate description unnecessary.

In the drawings, A represents the rod; B, the cross-head; G, the outer key; D, the inner key, and E the wedge. The outer key, 0, is provided with two laterally-projecting flanges or shoulders, x x, and with a centrally-arranged elongated notch, d, in its outer edge or side. The inner key, D, is provided with two elongated notches, f g, and a centrallyarranged laterally-proiecting flange, a", on its outer edge or side. The flange is adapted to press against the main portion of the rod A and the notch d to receive the end portion of said rod when the key 0 is forced outwardly by the wedge E, as hereinafter described.

(No model.)

In the use of my improvement the usual key which holds the cross-head onto the rod is removed and thekeys G D and Wedge E i11- serted in the key-hole, as shown in Fig. 1, the flange i resting against the body or main portion t of the rod A, and the notch d standing astride the end portion, Z, of said rod.

After the keys and wedge have been adjusted as shown in Fig. 1, the wedge is driven in between thekeys, causing the flange i to press inwardly against'the rod at t, and the flanges ac to press outwardly against the crosshead at z, and thereby force the crosshead from the rod,in a manner which will be readily obvious without a more explicit description.

The keys are respectively provided with heads r, to prevent them from entering the key hole in the cross-head and rod. too far as the wedge E is driven in.

Having thus explained my inventiomwhat I claim is 1. In a device for removing the cross-head from a piston-rod, the combination of the following instrumentalities, to wit: two keys and a wedge adapted to fit the ordinary keyhole in the cross-head and rod, one of said two keys being provided with a flange adapted to abut against the end of the main portion of the rod within the keyhole, and two notches or depressions adapted to receiveaportion of the inner end of the cross-head as it moves from the rod, and the other provided with two flanges adapted to abut against a portion of the outer end of the cross-head within the key-hole,and a notch or depression adapted to receive the end portion of the rod within the key-hole as the cross head moves from the rod, substantially as described.

2. The keys 0 D and wedge E, in combina tion with the rod A and cross-head B, substantially as set forth.

In a device for removing the cross-head from a piston-rod, the key 0, provided with the flanges x and notch d,the key D,provided with the notches f g and flange t, and the wedge E, substantially as described.

CARL A. MACKAY.

Witnesses:

A. F. REHLING,

O. A. SHAW. 

